地下水位和海平面变化对绥中砂质海岸海水入侵影响

Impact to the the seawater intrusion around sand coast in Suizhong with the variations of groundwater level and sea level

根据对绥中六股河口近滨海地区砂质海岸海水入侵区和过渡区长期的实时监测结果,同时依据地下水开采和季节性海平面变化情况,分析了海平面变化和地下水位变化对六股河附近地区海水入侵的影响,S-1井和S-2井2012年至2016年4 a间地下水位分别下降了4.60 m和0.59 m,造成了S-1井枯水季无水的现象,并且完全受控于海水,电导率值较高,S-2井地下水电导率值增加。同时,海平面变化不同程度上加剧了本地区海水入侵。

Through long-term monitoring of groundwater level and conductibility in the transition and intrusion zones of seawater intrusion for the sand coast area,conbined with the analysis of the seasonal groundwater exploitation and sea level change,the influence of sea level and groundwater level change on seawater intrusion in the Liugu river area has been analyzed.From 2012 to 2016 year,underground water level of S-1 and S-2 wells were decreased by 4.60 m and 0.59 m respectively,resulting in S-1 wells without water in withered water period.At the same time,the seasonal variation of sea level aggravate seawater intrusion in this area,which the S-1 well is completely controlled by the seawater with higher conductivity value,and groundwater conductivity value of S-2 increased,causing increasing trend of seawater intrusion.